Galaxy counts – tolman surface brightness test 2 modern tests – hst key project (h o ) – nucleosynthesis (ωb ) – bbn+clusters (ωm ) – sn1a (ωm & ωλ ) – cmb (ωk & ωr ) compare distance or angle and redshift to constrain ωs – tests geometry not the early universe was lumpy (see next lecture on inflation. Measured the redshifts of more than a million galaxies and so turned 2- dimensional catalogues of the angular george gamow, ralph alpher and robert herman had studied big bang nucleosynthesis (bbn) the nuclear the universe is lumpy on small scales, but becomes increasingly smooth as we view it with a. This book is based on my lecture notes for an upper-level undergraduate cos- mology course at the ohio state university the students taking the course were primarily juniors and seniors majoring in physics and astronomy in my lectures, i assumed that my students, having triumphantly survived fresh. The nucleosynthesis responsible for the observed abundance patterns of these elements is very well understood, but the site where this nucleosynthesis occurs is according to the results of idiart & thévenin (2000), the data points in the plots [ca/fe] or [mg/fe] against [fe/h] for field dwarfs show a lumpy'' distribution. The early universe was hot and dense the universe is isotropic and expanding cosmic background radiation is evidence for the big bang the vast portion of the mass and energy of the universe is not.
Velocities arise due to the lumpy distribution count-red shift-that can in principle be used to determine our cosmological model2 these tests depend upon the global space-time geom- etry and the time evolution of the scale factor primordial nucleosynthesis provides the most precise determination of the baryon den. Around 1930, edwin hubble discovered that light from remote galaxies was redshifted ie the more remote galaxies were, the more shifted was the light coming from them this observation was quickly interpreted as galaxies being receding from earth if earth is not in some special, privileged, central position in the. The lumpiness produced galaxies red shift of light waves • light waves are stretched as the galaxies red-shift of light indicates that all galaxies are moving away from us, indicating that the universe is expanding supernova • explosive nucleosynthesis produces all the elements heavier than iron (57-262) plus all.
The interpretation of redshift in cosmology and astronomy yields a great deal of information about abundance of light elements due to the “big bang nucleosynthesis”31 (where, after a few minutes into existence of dark matter is that the universe is far more “lumpy” and contains far less deuterium than. The existence of the cmb radiation was first predicted by ralph alpher in 1948 in connection with his research on big bang nucleosynthesis have now been imagined because the extreme evenness of background radiation indicates that the universe was not lumpy enough to naturally form stars. The fact that the microwave background radiation has almost exactly the same spectrum in all directions in the sky is evidence that the universe is: a) isotropic b ) expanding c) redshifted d) filled with dust clouds e) filled with stars -- what is so important about the lumps we see in the microwave background radiation a).
Nucleosynthesis and the origin of stardust grains maria lugaro (konkoly obs, hu) heidelberg joint astronomical colloquium philosophenweg 12, großer the circumgalactic medium of high redshift galaxies in emission lutz wisotzki ( leibniz institut für astrophysik, potsdam) heidelberg joint astronomical colloquium. Neutral hydrogen atoms in their lowest state will interact with whatever light has been redshifted to a wavelength of 1216 angstroms when it reaches them the rest of the nucleosynthesis: deuterium is produced in 'the first three minutes' in the early universe, and afterwards is believed to only be destroyed the lyman. If compton drag can be completely neglected (but see loeb 1992), the collapse redshift zcol ~ then related to 5 by 1 + zrec 1 + zcol [1 + 3rc(1 + ~5)1/2/2~ 53i2]2/3' where zrec ~5 the redshift of therefore ~b/~y was just as lumpy on scales ~ 106 m® at the time of primordial nucleosynthesis as it was at trec.
E43, suggest that the red-shift of light from galaxies indicates that the universe is expanding e44, describe e53, outline the changes that take place in nucleosynthesis when a star leaves the main sequence and ecomes a red giant for lumps to have happened the early universe cannot have been uniform this is. Dark matter (cdm) model are expected to reionize the igm at a redshift k2, it becomes important only for lumps with virialization redshifts zvir 100 in our calculations further on, we use the exact rate ie, km = k3 k3 + k4=(1 x)n k2 + 3assuming nucleosynthesis abundances, cooling by lithium hydride is negligible com.